$8.$ At the age of $68,$ Donna elected a straight life income option for the payout of her $$150,000$ deferred annuity. She received monthly payments for three years, totaling $$42,000,$ and then she died. How much will her beneficiary receive?

a$.$ $$150,000$

b$.$ $$108,000$

c$.$ $$42,000$

d$.$ $$0$